稳压芯片7905

发布时间：2020-05-26 21:23:25 来源：文档文库

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LM7905中文资料(引脚图,电气特性参数,应用电路)

负5V,1A输出三端稳压器LM7905中文资料(引脚图,电气特性参数,应用电路)

LM7905引脚图及外形图:

图1 LM7905外形引脚排列图管脚图

LM7905内部电路图:

图2 79XX内部电路图

LM7905电气特性参数:

Electrical Characteristics 电气特性 (MC7905/LM7905)

(VI = -10V, IO = 500mA, 0℃ ≤TJ ≤ +125℃, CI =2.2μF, CO =1μF, unless otherwise specified.)

Parameter 参数	Symbol 符号	Conditions条件		最小.	典型.	最大.	Unit
Output Voltage 输出电压	VO	TJ=+25℃		- 4.8	- 5.0	- 5.2	V
Output Voltage 输出电压	VO	IO = 5mA to 1A, PO ≤ 15W VI = -7V to -20V		- 4.75	-5.0	- 5.25	V
Line Regulation (Note1) 线性调整率	ΔVO	TJ=+25℃	VI = -7V to -20V IO = 1A	-	5	50	mV
		TJ=+25℃	VI = -8V to -12V IO = 1A	-	2	25
		VI = -7.5Vto -25V		-	7	50
		VI = -8V to -12V IO = 1A		-	7	50
Load Regulation 负载调整率(Note1) (Note1)	ΔVO	TJ = +25℃ IO = 5mA to 1.5A		-	10	100	mV
Load Regulation 负载调整率(Note1) (Note1)	ΔVO	TJ =+25℃ IO = 250mA to 750mA		-	3	50	mV
Quiescent Current静态电流	IQ	TJ =+25℃		-	3	6	mA
Quiescent Current Change静态电流变化	ΔIQ	IO = 5mA to 1A		-	0.05	0.5	mA
Quiescent Current Change静态电流变化	ΔIQ	VI = -8V to -25V		-	0.1	0.8	mA
Temperature Coefficient of VD温度系数	ΔVo/ΔT	IO = 5mA		-	- 0.4	-	mV/℃
Output Noise Voltage 输出噪声电压	VN	f = 10Hz to 100KHz TA =+25℃		-	40	-	μV
Ripple Rejection 纹波抑制	RR	f = 120Hz ΔVI = 10V		54	60	-	dB
Dropout Voltage 电压差	VD	TJ=+25℃ IO = 1A		-	2	-	V
Short Circuit Current 短路电流	ISC	TJ =+25℃, VI = -35V		-	300	-	mA
Peak Current 峰值电流	IPK	TJ =+25℃		-	2.2	-	A

三端稳压集成电路极限参数：

Parameter 参数		Symbol 符号	Value 数值	单位
Input Voltage输入电压	(for VO =5V to 18V)	VI	35	V
Input Voltage输入电压	(for VO =24V)	VI	40	V
Thermal Resistance Junction-Cases 热阻(结到壳) (TO-220)		RθJC	5	℃/W
Thermal Resistance Junction-Air热阻(结到空气) (TO-220)		RθJA	65	℃/W
Operating Temperature Range工作温度范围		TOPR	0 ~ +125	℃
Storage Temperature Range储存温度范围		TSTG	-65 ~ +150	℃